OPERATION
33
4.8
Corner
joint
3.2
3.2
9
175
~
250
20
Notice: the above parameters originate from
《
Welding Dictionary
》
P150, Volume 1 of Edition 2.
Parameters of AC TIG (MMA) for Aluminum and its alloy
Sheet
thickness
/mm
Welding
wire
diameter
/mm
Tungsten
electrode
diameter
/mm
Pre-heat
Temper
-ature
/
℃
Welding
current
/A
Argon
flow
rate
/
L·min
-1
Gas
nozzle
diameter
/mm
Remark
1
1.6
2
-
45
~
60
7
~
9
8
Flange welding
1.5
1.6
~
2.0
2
-
50
~
80
7
~
9
8
Flange or butt
welding by one
side
2
2
~
2.5
2
~
3
-
90
~
120
8
~
12
8
~
12
Butt welding
3
2
~
3
3
-
150
~
180
8
~
12
8
~
12
V-groove butt
welding
Parameters of piping back sealing welding for mild steel
(
DCEP
)
Piping
diameterΦ/mm
Tungsten
electrode
diameter/mm
Gas nozzle
diameter/mm
Welding wire
diameter/mm
Welding
current/A
Arc
voltage/V
Argon
flow
rate
/
L·min
-1
Welding
rate
/
cm·min
-1
38
2.0
8
2
75
~
90
11
~
13
6
~
8
4
~
5
42
2.0
8
2
75
~
95
11
~
13
6
~
8
4
~
5
60
2.0
8
2
75
~
100
11
~
13
7
~
9
4
~
5
76
2.5
8
~
10
2.5
80
~
105
14
~
16
8
~
10
4
~
5
108
2.5
8
~
10
2.5
90
~
110
14
~
16
9
~
11
5
~
6
133
2.5
8
~
10
2.5
90
~
115
14
~
16
10
~
12
5
~
6
159
2.5
8
~
10
2.5
95
~
120
14
~
16
11
~
13
5
~
6
219
2.5
8
~
10
2.5
100
~
120
14
~
16
12
~
14
5
~
6
273
2.5
8
~
10
2.5
110
~
125
14
~
16
12
~
14
5
~
6
325
2.5
8
~
10
2.5
120
~
140
14
~
16
12
~
14
5
~
6
Notice: the above parameters originate from
《
Welding Dictionary
》
P167, Volume 1 of Edition 2.